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7627598 
Journal Article 
The naphthalene-benzene anion: Anion complex of aromatic hydrocarbons with the smallest electron affinity 
Song, JK; Lee, NK; Han, SY; Kim, SK; , 
2002 
Yes 
Journal of Chemical Physics
ISSN: 0021-9606
EISSN: 1089-7690 
AMER INST PHYSICS 
MELVILLE 
117 
22 
9973-9976 
English 
WOS:000179340600001 
The mixed cluster anions between naphthalene and benzene were studied by mass spectrometry, photoelectron spectroscopy, and theoretical calculations. We found clear evidence for a stable anion of the 1:1 complex, [(Np)(1)(Bz)(1)](-), which has the smallest electron affinity measured so far for complexes of aromatic hydrocarbons. The photoelectron spectrum of [(Np)(1)(Bz)(1)](-) was identical in shape with those of (Np)(2)(-) and [(Np)(1)(H2O)(1)](-), implying the presence of a common ion core, (Np)(-), in these systems. Thus [(Np)(1)(Bz)(1)](-) is viewed to be (Np)(1)(-)(Bz)(1), where Bz stabilizes the core anion, (Np)(-), as a neutral solvent. The geometry of (Np)(1)(-)(Bz)(1) was calculated to be T-shaped, with a strong character for the pi-hydrogen bonding. An adiabatic electron affinity of 0.01 eV was determined from the measured vertical detachment energy of 0.03 eV and the theoretical estimate of the energy difference between the two neutral structures involved. (C) 2002 American Institute of Physics.